can a man of 18 go to jail for having sex with a girl of 15 if she lies about the age

[bored-teen-1]

My friend is 18, at a party he met a girl who said she was 16.
Two days later she told him she was 15. Now her parents are getting the police involved.
They were both drunk and he had been smoking cannabis when they had sex.
Could he go to jail for this?

[murraymints]

too late even !